Universal truck with steering and driving wheels

Claim 1

IN A VEHICLE HAVING A CHASSIS FRAME WHICH INCLUDES FRONT AND REAR END PORTIONS, A PAIR OF PIVOTS ROTATABLY SUPPORTED IN SAID CHASSIS FRAME AT THE FRONT END, A PAIR OF PIVOTS ROTATABLY SUPPORTED IN SAID CHASSIS FRAME AT THE REAR END, SAID PIVOTS EXTENDING VERTICALLY THROUGH SAID CHASSIS FRAME, AND WHEELS CARRIED BY EACH OF SAID PIVOTS FOR SUPPORTING SAID CHASSIS FRAME IN A SUBSTANTIALLY HORIZONTAL PLANE; A STEERING SYSTEM FOR CONTROLLING THE DIRECTIONAL MOVEMENT OF THE VEHICLE, SAID SYSTEM COMPRISING: A SPROCKET FIRMLY CONNECTED TO EACH OF THE REAR PIVOTS ON SAID CHASSIS FRAME; A SPROCKET LOOSELY MOUNTED ON EACH OF THE FRONT PIVOTS ON SAID CHASSIS FRAME, EACH OF THE LAST-MENTIONED SPROCKETS HAVING PARALLEL UPPER AND LOWER SURFACES, THE UPPER SURFACES HAVING UPSTANDING PROJECTIONS; A STEERING ROD LOOSELY MOUNTED AT ONE END ON EACH OF SAID FRONT PIVOTS AND SPACED AXIALLY A DISTANCE ABOVE THE LAST-MENTIONED SPROCKETS, SAID STEERING RODS HAVING PARALLEL UPPER AND LOWER SURFACES, SAID LOWER SURFACES HAVING PROJECTIONS THEREON; A TIE-ROD INTERCONNECTING THE OTHER ENDS OF SAID STEERING RODS; A COUPLING CARRIED BY EACH OF SAID FRONT PIVOTS INTERMEDIATE SAID STEERING RODS AND SAID LAST-MENTIONED SPROCKETS, SAID COUPLINGS HAVING PARALLEL UPPER AND LOWER SURFACES, SAID UPPER AND LOWER SURFACES HAVING RECESSES, SAID COUPLINGS FURTHER ROTATING WITH SAID FRONT SUPPORTED PIVOTS AND BEING SLIDABLE AXIALLY ON SAID PIVOTS FROM A FIRST OPERATIVE POSITION WHEREIN THE LOWER SURFACES THEREOF ENGAGE THE UPSTANDING PROJECTIONS ON SAID LAST-MENTIONED SPROCKETS TO A SECOND OPERATIVE POSITION WHEREIN THE UPPER SURFACE RECESSES THEREOF ENGAGE THE LOWER SURFACE PROJECTIONS ON SAID STEERING RODS; MEANS CARRIED BY SAID CHASSIS FRAME AND CONNECTED TO SAID TIE-ROD FOR MOVING SAID TIE-ROD IN A PLANE PARALLEL TO SAID CHASSIS FRAME FOR EFFECTING AN IDENTICAL ANGULAR ROTATION TO SAID FRONT PIVOTS WHEN SAID COUPLINGS ARE IN A SECOND OPERATIVE POSITION; AN ENDLESS CHAIN ENGAGING ALL OF SAID SPROCKETS; AND MEANS CARRIED BY SAID CHASSIS FRAME AND OPERABLE TO MOVE SAID ENDLESS CHAIN FOR EFFECTING IDENTICAL ANGULAR ROTATIONS IN ALL OF SAID PIVOTS WHEN SAID COUPLINGS ARE IN A FIRST OPERATIVE POSITION.